聚合物
膜
纳米颗粒
材料科学
化学工程
金属有机骨架
选择性
烟气
磁导率
胺气处理
色散(光学)
纳米技术
化学
吸附
复合材料
有机化学
催化作用
光学
生物化学
工程类
物理
作者
Behnam Ghalei,Kento Sakurai,Yosuke Kinoshita,Kazuki Wakimoto,Ali Pournaghshband Isfahani,Qilei Song,Kazuki Doitomi,Shuhei Furukawa,Hajime Hirao,Hiromu Kusuda,Susumu Kitagawa,Easan Sivaniah
出处
期刊:Nature Energy
[Springer Nature]
日期:2017-06-05
卷期号:2 (7)
被引量:473
标识
DOI:10.1038/nenergy.2017.86
摘要
Mixed matrix membranes (MMMs) for gas separation applications have enhanced selectivity when compared with the pure polymer matrix, but are commonly reported with low intrinsic permeability, which has major cost implications for implementation of membrane technologies in large-scale carbon capture projects. High-permeability polymers rarely generate sufficient selectivity for energy-efficient CO2 capture. Here we report substantial selectivity enhancements within high-permeability polymers as a result of the efficient dispersion of amine-functionalized, nanosized metal–organic framework (MOF) additives. The enhancement effects under optimal mixing conditions occur with minimal loss in overall permeability. Nanosizing of the MOF enhances its dispersion within the polymer matrix to minimize non-selective microvoid formation around the particles. Amination of such MOFs increases their interaction with thepolymer matrix, resulting in a measured rigidification and enhanced selectivity of the overall composite. The optimal MOF MMM performance was verified in three different polymer systems, and also over pressure and temperature ranges suitable for carbon capture. Mixed matrix membranes can separate CO2 from flue gas mixtures but increasing selectivity without sacrificing permeability remains challenging. Selectivity can be increased with little loss in permeability by using nanoparticulate, amine-functionalized metal–organic framework fillers.
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